Micrometer-gage.



J. TAGUE.

MIGROMETBR GAGE.

APPLICATION FILED 0013, 1912. 1,065,637, Patented June 24,1913.

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MIGROME'IER-GAGE.

Patented June 24, 1913. Application filed. October 3, 1912. Serial No.723,732.

1,065,637. Specification of Letters Patent.

when is turned, draws the stem 10 and To all whom it may concern:

Be itknown that I, JAMES TAGUE, a citithus imparts movement to the jaw6. The zen of the United States, residing at Chistem is preferablyformed integral with the cago, in the county of Cook and State of jaw 6.The opposite ends of the opening Illinois, have invented certain new anduse- 14 have reduced portions 16 through which ful Improvements inMicrometer-Gages, of are visible graduations 1.7 on the stem 10, whichthe following is a specification. Said graduations being next to theends of The gage which is the subject of the presthe threaded portion ofthe stem. The nut ent invention is designed more particularly 13 alsohas a graduated surface 18 at each for articles of more or less uniformdimenend. The movement of the jaw 6 is limited sions for the purpose ofgaging the same by a transverse pin 19 passing through the to exactdimensions. shank 7 and through a slot 20 in the reduced It is theobject of the invention to provide jaw portion 9.

a gage of the kind stated which is simple in The gage is designed tomeasure .050 of construction and capable of a fine adjustan inch eachway from a point called the 'ment in order to obtain accurate results.center or middle, the total range being there- These objects areattained by a combinafore .100 of an inch. Hence, the gage, taktion andarrangement of parts to be'hereining work that approximates said centeror after described in detail and claimed, refmiddle, can size up thework Within .050 of 5 erence being had to the accompanying drawan incheach way. The graduated portions ing in which of the stem 10 have alongitudinal zero line Figure 1 is a side elevation of the gage; 21.When the zero point on the nut 13 coin- Fig. 2 is an edge view thereof,and Fig. 3 cides with the line 21, the center or middle is a section onthe line 33 of Fig. 2. Fig. point of the gage is indicated. 30 4 is anenlarged elevation of a fragment of I claim: the graduated stemhereinafter referred to. 1. A micrometer gage comprising ashank,

Referring specifically to the drawing, 5 a jaw extending from the shank,said shank and 6, respectively, denote the two jaws of having a recessand a longitudinal bore exthe gage between which the work to be tendingtherefrom, and an opening inter- 5 measured is placed. The faces of thejaws secting said bore, a jaw having a reduced are plain and parallel.The jaw 5 extends portion which is slidably mounted in the from a shank7, and the jaw 6 has a sliding recess, a stem extending from saidreduced connection with saidshank. This connecportion into the bore,said stem having a tion is made as follows: The end of the threadedportion and graduations at the shank, opposite the end from which thejaw ends thereof, and a non-traveling nut 5 extends, has a recess 8 inwhich the rescrewed on the threaded portion of the stem duced inner end9 of the jaw 6 seats, said and seating in the aforesaid opening, saidportion of the jaw being made slightly wider nut having a graduatedsurface, and the than the work-engaging portion thereof, and openingbeing reduced at its ends to expose being flush with the inner edge ofthe shank. L the graduated portions of the stem. The inner end of thereduced jaw portion 9 2. A micrometer gage comprising a shank, has astem 10 which extends at a right ana jaw extending from the shank, saidshank gle to the jaw. The stem is cylindrical and having a longitudinalbore and an opening works in a longitudinal bore 11 made in theintersecting the same, a jaw having a stem 10o shank 7 The stem has afinely threaded which extends into the bore, said stem havportion12 onwhich is screwed a non-traveling a threaded portion and graduations ating cylindrical nut 13 seating in a transverse the ends thereof, and anon-traveling nut opening 14 in the shank, said opening interscrewed onthe threaded portion of the stem secting the bore. The nut has aninterme and seating in the aforesaid opening, said diate knurled surface15 to facilitate the nut having a graduated surface, and the turningthereof. opening being reduced at its ends to expose It will be obviousfrom the foregoing that the graduated portions of the stem.

the jaw 6 is caused to approach the jaw 5 3. A micrometer gagecomprisingashank, upon turning the nut 13 in one direction, a jawextending from the shank, said shank 11c and to recede therefrom uponturning the having a recess and a longitudinal bore extending therefrom,and an opening internut in the opposite direction. The nut,

the stem and a transverse pin carried by the shank and passing throughthe aforesaid slot in the inner portion of the second-mentioned jaw.

In testimony whereof I afiix my signature in presence of two Witnesses.

JAMES TAGUE.

Vitnesses S. J. Lemme, H. G. BATCHELOR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Yatents, Washington, D. C.

